ground meat (about 600 grams) • tomato purée (about 200 ml) • medium onion (about 3 1/2 oz or 100 grams) • salt (about 10 grams) • white wine (about 50 ml) • fresh tomatoes, diced (about 200 grams) • celery (about 60 grams) • carrot (about 100 grams) • Bay leaf, to taste